content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.joins;
  
  import hu.akarnokd.rxjava3.functions.Consumer3;
  import io.reactivex.rxjava3.core.Notification;
  import io.reactivex.rxjava3.functions.Action;
  
  /**
   * Represents an active plan.
   * @param <T1> the first value type
   * @param <T2> the second value type
   * @param <T3> the third value type
   */
  final class ActivePlan3<T1, T2, T3> extends ActivePlan0 {
      private final Consumer3<T1, T2, T3> onNext;
      private final Action onCompleted;
      private final JoinObserver1<T1> first;
      private final JoinObserver1<T2> second;
      private final JoinObserver1<T3> third;
  
      ActivePlan3(JoinObserver1<T1> first,
              JoinObserver1<T2> second,
              JoinObserver1<T3> third,
              Consumer3<T1, T2, T3> onNext,
              Action onCompleted) {
          this.onNext = onNext;
          this.onCompleted = onCompleted;
          this.first = first;
          this.second = second;
          this.third = third;
          addJoinObserver(first);
          addJoinObserver(second);
          addJoinObserver(third);
      }
  
      @Override
      protected void match() throws Throwable {
          if (!first.queue().isEmpty()
                  && !second.queue().isEmpty()
                  && !third.queue().isEmpty()) {
              Notification<T1> n1 = first.queue().peek();
              Notification<T2> n2 = second.queue().peek();
              Notification<T3> n3 = third.queue().peek();
  
              if (n1.isOnComplete() || n2.isOnComplete() || n3.isOnComplete()) {
                  onCompleted.run();
              } else {
                  dequeue();
                  onNext.accept(n1.getValue(), n2.getValue(), n3.getValue());
              }
          }
      }
  
  }
  